Index: trunk/src/org/openstreetmap/josm/actions/ImageryAdjustAction.java
===================================================================
--- trunk/src/org/openstreetmap/josm/actions/ImageryAdjustAction.java	(revision 8151)
+++ trunk/src/org/openstreetmap/josm/actions/ImageryAdjustAction.java	(revision 8152)
@@ -17,4 +17,6 @@
 import java.awt.event.MouseListener;
 import java.awt.event.MouseMotionListener;
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
 import java.util.Formatter;
 import java.util.Locale;
@@ -207,4 +209,5 @@
             setContent(pnl);
             setupDialog();
+            addWindowListener(new WindowEventHandler());
         }
 
@@ -302,4 +305,11 @@
             }
         }
+
+        class WindowEventHandler extends WindowAdapter {
+            @Override
+            public void windowClosing(WindowEvent e) {
+                setVisible(false);
+            }
+        }
     }